Locking device for tack-raceways.



A. WITT.

LOGKING DEVICE FOR TACK RAGEWAYS.

APPLICATION FILED AUG. 18, 1910.

Patented Oct. 7, 1913.

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WfTJVE 55g [NI ENTOR AzlomeyA COLUMBIA PLANOGRAPM c0. WASHINGTON, 04 c4 ANTHONY wins, or DANVILLE, VIRGINIA.

LOCKING DEVICE FDR TAOK-RAGEW'AYS.

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Specification of Letters Patent.

Patented @ct. 7, fi i Application filed August 18 1910. Serial No. 577,778.

To all whom it may concern Be it known that I, rin'rnoizr Wrrr, a citizen of the United States, residing at Danville. in the county of Pittsylvania and State of irginia, have invented certain new and useful Improvements in Locking Devices for Tack-Raceways; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to mechanism for inserting i'astenings and particularly to means for supplying fastenings in an inserting machine.

The invention has for its object to provide in a nailing machine having a plurality of raceways improved means for the control of the shifting of the delivery raceways so that it will be impossible to shift from one raceway t0 the other at such a time that a tack may be caught between the end of the raceway and the selecting finger or other part of the separating and delivering devices, thus causing injury thereto. The invention is not, however, limited to use with machines having a plurality of raceways but may be used with any tacking or nailing machine where it is desired at times to disconnect the source of tacks from the tack feeding mechanism.

In lasting shoes it is desirable to use comparatively short tacks when the machine is operating on those parts of the shoe where the thin edge rest is employed, and tacks ot' a greater length when the machine is operating on those parts of a shoe where the thick edge rest is used that is, at the heel and toe.

it is indispensable to the proper use of the machine that the operator change from one rest to the other in going around the shoe, using the thick rest at the toe and heel portions where the upper is much thickened by folding, and the thin rest at the shank and ball portions where the upper is not tolded over upon itself. The careless workman may, however, neglect to change from the long tacks at the toe and heel portions to the short at the shank and ball. portions unless, as herein shown, the thick rest is interconnected with the raceway so that when the thick rest is pushed back the racel way is shifted so that the channel with the short tacks is opposite the separating device.

In the drawings, Figure 1 shows a portion of a lasting machine, including the tack block operating mechanism and lasting head; and Fig. 2 is a section of F 1 on the line 2-2 showing more in detail the elements of the present improvement.

In the portion of the lasting machine to which the present invention is shown attached by way of example, 1. is a thin edge rest secured to the frame of the machine and adapted to be used for guiding the shoe while the shank and ball portions of the shoe are being lasted.

2 indicates a thick edge rest arranged to be moved forwardly and backwardly with respect to the thin edge rest 1. The edge rest 2 has a thick acting face and is adapted to be used while the toe and heel of a shoe are being lasted so as to give a firm support against which the shoe may be pressed and which may be moved back wardly out of operative position while the shank and ball portions are being lasted, it being impracticable to employ a thick edge rest as a guide in lasting these portions. The edge rest 2 arranged to slide on downwardly inclined guiding flanges 3 upon a web ldepending from the machine frame, the inclination of the flanges serving to bring the slide 2 downward as well as backward. F or sliding the thick rest backward and forward a. finger piece 6 is provided as seen in Fig. 1..

The lasting machine is provided with mechanism for supplying fastenings to be inserted for holding the successively lasted portions of the upper in place. The mechanism for supplying fastenin'gs, so far as herein shown, comprises a movable guide shown as a raceway section or block 8 pro vided with a plurality of channels 10 and 12 for holding diiterent sizes of tacks. The raceway is pivoted at its upper end so that its lower end is capable or limited lateral movement with respect to the tack separating mechanism so that either of the channels 10 or 12 may be presented opposite the discharge opening 14: in the fixed plate '16.

The tack separating" mechanism consists of a stationary block 15 at the end of the raceway and reciprocating part 23 carrying a plate 18 having a selecting finger 22. Secured to the stationary block 15 by the hexagonal headed screws 11 is a plate 16 above plate 18 provided with a slot 13, admitting the body of the nail. but not per mitting the head to drop through, and with the enlarged end 14 through which the head may pass. The plate 18 is provided with the recess 19 and the inclined slot'20 having the circular enlargement 21 at the end which, in one limiting position of reciprocation, coincides with the enlarged end 14 of slot 13. The slot 13 is in plate 16 which is similar to plate .23 of Patent No. 999,233, Aug. 1, 1911. In the other limiting position the recess 19 lies under the restricted portion of the slot 13 in the plate 16 with the line of tacks in the channel resting thereagainst. The recess 19 and slot 20 in the plate 18 form a separating finger 22 at one end of the said recess, the depth of the recess being equal to the thickness of the body of a tack. The plate 18 is reciprocated by a lever 31 pivoted at to a stationary part of the machine and having a segmental rack engaging a straight rack attached to the slide 23 carrying the plate 18. as shown in the United States patent to Cavanagh, No. 873,018. The lever 31 is jointed about the pivot and between the members constituting the lever is interposed the spring held pin 39. This structure is to guard against fracture or injury of the parts in case the separating device should catch or bind from any cause as by reason of crooked nails being fed thereto. The lever 31 is oscillated upon the pivot 33 by means of a cam plate 41 carried by the tack block and engaging the roller 43 on the end of the lever 31. The roller is spring pressed against the face of the cam by means of a spring 45 one end of which bears against a part of the machine frame and the other against the end of the lever 31. 1%. rod 47 attached to the abutment of the spring passes loosely through a hole in the end of the lever to prevent displacement of the spring. As the tack block is drawn backward the roll 43 rides down the cam face of the plate 41 and the end of the lever 31 is moved in the opposite direction to reciprocate the separating finger on the plate 18 across the end of the tack raceway. When, by the mechanism described the plate is reciprocated in suitable timed relation to the other parts of the machine the finger 22 slips behind one tack and separates it from the line in the channel. The plate 18 moves the tack down the slot 20 to the enlarged end thereof with which the discharge opening 14 now coincides. The tack is thus released and allowed to drop into the opening 25 of the tack carrying block 26 which at this period of the operation of the machine is drawn back under the tack separating mechanism so that the opening 25 coincides with the slot enlargements 14 and 21.

A bracket 28 secured to the frame of the machine has journaled therein the shaft 30 whichicarries at its lower end the radius bar 32 of the toothed segment A plate 36 carrying a rack 38 is secured to the edge rest by screws 40. The teeth of the rack mesh with the teeth of the segment 34 so that as the edge rest is moved the shaft 30 is rotated. A disk 42 is fixed eccentrically on the shaft 30 and providedon its lower side with a cam groove 44. The connecting rod 46 is attached by a universal joint to the tack supplying raceway 8 at one end and at the other connects by an adjustable joint with a fork 48 which embraces the shaft 30. From the upper side .of the fork 48 a pin 50 extends up into the camgroove 44. From this construction it will be seen that movement of the edge rest to the forward or operative position will. through. the rack 38 and segment 34, rotate the shaft 30 ant disk 42 in counter-clockwisedirection as shown. in Fig. 2 and that the cam slot in r the disk will move the pin, fork and connecting rod 46 to shift the acenvay into position to deliver tacks from the channel 12 which supplies the longer tacksto the tack separating mechanism. .Vhen the edge rest is moved back out of the way the parts willy of course, be returned to the position shown in Fig. 2 and shorter tacks from the channel 10 will be delivered to the tack separating mechanism for lasting the shank portion of the shoe. 7

It sometimes happens that the operator will attempt to shift the raceway to change from one length of tacks to the other, or will attempt to shiftthe thick rest backward or forward. where the rest and raceway shifting mechanism are interconnected as just described, when a tackis just in the act of passing from the raceway to the tack separating and delivering mechanism with the result that the finger or other part of the separating device is jammed against the tack and thereby injured.

It is the object of the present invention to lock the raceway from movement dur- The present device comprises a bracket 51, fastened adjustably by means of the slot 52 and bolt 54 to the frame of the machine behind the tack carrying block 26 which is moved backward under the tack separating device and forward under the nailing plunger 55 by means of the L-shaped connecting bar 58 the lever 60 and cam 62 on the main shaft 64 of the machine. Description-of w re? these parts will be found in the patent above mentioned.

Arranged to reciprocate in the housing 66 on the bracket 51 is a locking bar 6811aing a tapered end adapt-ed to engage corresponding sockets 7O fori'ned in the side of the rack 38 opposite the teeth. The locking bar 68 is held normally in locking engagement with the socket 70 by means of a spring 72 in the housing (36 which spring press s at one end against the housing and at the other against an enlargement 74 on the locking bar which extends into the hous ing. Adjacent the enlargement 74 is the cam block 76 having an inclined end 78 which is adapted to be engaged by a corresponding inclined portion 80 on the tack block 26.

It will now be seen that while the tack block and its slide 58 occupy the forward portion of their path, which is coincident with the transit of the tack across the division between the raceway and the separator, the locking bar 68 is held in engagement with the rack 38 and prevents the raceway from being shifted. But during the latter portion of the retreat of the tack block and slide and the early portion of their advance, the locking bar is held out of the sockets in rack 38 nd permits the raceway to be shifted by bringing the edge rest forward to supply long tacks for the toe and heel or by moving the edge rest backward to supply shorter tacks for lasting the shank and ball portions of the shoe. Hence as the means for shifting the raceway from one channel to the other is locked while the tack is being separated from the line of tacks in the channel, it is impossible, as sometimes happens in machines not provided with the present improvement, to shift the raceway during the period of translation of the tack from the channel to the separating mechanism, which would jam the tack between the raceway and the separating finger or other part of the separating mechanism, and might result in injury to the latter.

lVhile the device has been shown in a structure in which the edge rest shifting means and the raceway shifting mechanism are intercoimected so that their movements take place simultaneously, it is to be understood that the present device is equally adapted to a machine in which the tack raceway is shifted independently of any edge rest, or in which a raceway having a single channel is employed and the feeding therefrom is at times to be discontinued.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a machine of the class described, tack separating mechanism, operating means therefor, a movable raceway having a plurality of tack conducting channels, and means controlled by the separating mechanisn'i to lock and unlock the raceway.

2. In a machine of the class described, a movable raceway provided with a plurality of channels, a separating device, and means controlled thereby for holding the raceway stationary during operations of the separating device and releasing it between such operations.

3. In a machine of the class described, a movable raceway provided with channels, a separating device provided with a slot, actuating means therefor, a movable edge rest, means for moving said raceway and said edge rest simultaneously to present either of said channels opposite said slot, and means controlled by said separating mechanism for locking the raceway against move ment during movement of the separating device.

a. In a lasting machine, a raceway provided with channels, a separating mechanism, an edge rest arranged to be moved into and out of operative position, means whereby movement of the edge rest shifts the raceway relatively to the separating mechanism, and means controlled by said separating mechanism whereby the edge rest is held from movement during the operation of the separating mechanism.

5. in a lasting machine, a tack block, a driver, means for supplying different kinds of tacks, means for separating either of the kinds one at a time and presenting them to the tack block, means for reciprocating the tack block, an edge rest arranged to be shifted, means operated by shifting the edge rest for changing the tack supplying means from one kind to the other, and means locking the edge rest from movement when the tack block in its position for presenting a tack to the driver and air ranged to be moved to imlocking position by the backward movement of the tack block.

6. In a lasting machine, a tack block, a raceway provided with channels, a separating device, an edge rest slidingly mounted, connections between the edge rest and raceway whereby the latter is shifted laterally upon movement of the former, a spring pressed bar normally locking the edge rest against movement, a cam on said bar, and a cam surface on said tack block arranged to engage said cam for unlocking said edge rest when the tack block is retracted.

1' in a lasting machine, a driver, a tack block, a raceway having channels, means for separating tacks from either of said channels, and presenting them to the tack block, means for reciprocating the tack block to present the tack to the driver, a movable edge rest, means communicating movement from said edge rest to said raceway, whereby either of the channels may raceway during operation of the separat-' 1119; means.

8. In a device of the class described, a reciprocating tack block, a tack separating device, a slidable edge rest, a tack raceway having a plurality of channels and mounted for movement to bring different channels into operative relation to the separating device, a rack on said edge rest having recesses in its back, a spring pressed locking pin normally engaging one of said recesses,

a cam block on said pin, a cam face on said tack block adapted to engage said cam block when said tack block is near its rear ward limit 01? reciprocation, a toothed segment engaging said rack, and connections between said segment and said raceway whereby movement of the segmentwill shift the raceway.

In testimony whereof I have; afiixed my signature, in the presence of two witnesses.

ANTHONY WITT.

Witnesses:

7M. F. DOYLE, G. J. WEBER.

Copies of this patent may be obtained for five cents each, by. addressing the commissioner of Patents Washington, D. (1. 

